. >> this is a new science. we're trying to step up and understand that. >> raji arasu is the chief technology officer. >> we know the buyers' buying patterns already. we're taking it to the next level by understanding the click rate. what they might intend to do. it is not about selling one ticket per second. >> interesting stuff. it has dramatically changed the ticket business. >> we all know about that. thank you, cory. payment power may be taking off. the marketplace is still the core of the company. how are they keeping their digital shopping business booming? that is next. ♪ >> welcome back to a special edition of "bloomberg west." i'm emily chang. while ebay's payments business is clearly booming, the core of the company is still in its ebay marketplace. as more retailers offer their own marketplace, how are they making their marketplace better? jon erlichman is back with more. >> you are right about that. the marketplace is more than half of the revenue. two thirds of the operating income. the guy who